opengl 3 1 tutorial

Label: style blog Io color ar OS for SP OpenGL supports two color modes: rgba and color index.In either color mode, the computer must save some data for each pixel. The difference is that in the rgba mode, data directly represents the color, while in the color index mode, data represents an index, to get the true color, you must also query the index table. 1. rgba color In rgba mode, each pixel stores the

); Glutinitdisplaymode (Glut_rgb|glut_single); Glutinitwindowposition (0,0); Glutinitwindowsize ( -, -); Glutcreatewindow ("OpenGL 3D View"); Init (); Glutdisplayfunc (display); Glutmainloop (); return 0;}voidinit () {Glclearcolor (0.0,0.0,0.0,0.0); Glmatrixmode (gl_projection); Glortho (-5,5, -5,5,5, the); Glmatrixmode (Gl_modelview); Glulookat (0,0,Ten,0,0,0,0,1,0);}voiddisplay () {glclear (gl_color_buffer_bit); gl

Transferred from: http://www.cnblogs.com/opengl/archive/2012/10/30/2747130.html1 . Experimental Purpose:Understand how an OpenGL program translates, rotates, and scales transformations.2 . Experimental content:(1) Reading the experiment principle, running the demonstration experiment code, mastering the OpenGL program

following code, we're going to write nehe, spaces, dashes, spaces, and then the result of the rot's value divided by 50 (in order to slow down the counter). If this number is greater than 999.99, the fourth number on the left will be removed (we require only 3 digits to the left of the decimal point). Show only decimalsTwo digits to the right of the dot.Glprint ("Nehe-%3.2f", rot/50); Output Text to screenThen increase the rotation variable to change

! The next thing to do is draw the rendering, I deleted some two geometry, because they are not visually good. Of course we need OpenGL to automatically generate coordinates for these geometries, then select the sphere to map the texture and draw the geometry. Finally putThe OpenGL state is set to normal mode.int Drawglscene (glvoid){Glclear (Gl_color_buffer_bit | Gl_depth_buffer_bit);Glloadidentity (); Res

time, so you can use it to write a CS. However, bloggers still believe that learning things should be driven by economic benefits and work needs. Otherwise, they should not learn things. In this age of explosive knowledge, it is necessary to advocate time saving, try to use time on the cutting edge. We use vs2010 C # To build a blank windows form application. First, put the three dll files in the downloaded SharpGL (except for serialization. dll) Introduce C #, and then select SharpGL for "se

. We only have one attribute, so the value is 0. If we have two attributes, A position and a normal direction. If they are all vectors in the 3-dimensional float format, this parameter must be set to (6*4) = 24 byte, And the last parameter is offset, if there are two attributes, this value is 0 for the first attribute, no offset, and 12 for the second attribute. glDrawArrays(GL_POINTS, 0, 1); Finally, we ca

" bytesTexture->imagedata[currentbyte] = colorbuffer[2];Copy "G" bytesTexture->imagedata[currentbyte + 1] = colorbuffer[1];Copy "B" bytesTexture->imagedata[currentbyte + 2] = colorbuffer[0];if (Tga.bytesperpixel = = 4)//If it is a 32-bit image{Copy "A" byteTexture->imagedata[currentbyte + 3] = colorbuffer[3];}Currentby

#include "freetype.h"Now we can call the FreeType library to draw the string.Save information on the fonts we created Freetype::font_data Our_font;Next use the Test.ttf file to initialize the fontOur_font.init ("Test.ttf", 16);Remember to release memory resources at the end of the programOur_font.clean ();Here is our specific drawing function.int Drawglscene (glvoid) {glclear (Gl_color_buffer_bit |Gl_depth_buffer_bit);Glloadidentity (); Gltranslatef (0.0f,0.0f,-1.0f);Blue textGlcolor3ub (0,0,0XF

. Renderer interface methods: 1. onsurfacecreated () When creating a glsurfaceview object, the system calls this method once. This method is used to execute actions that only occur once, such as setting OpenGL environment parameters or initializing OpenGL graphics objects. 2. ondrawframe () This method is called every time you repaint a glsurefaceview object. Thi

Do you think the scope of our drawing is too narrow when we draw the geometry in front of us? Coordinates can only be from 1 to 1, and can only be XAxis to the right, Y axis up, vertical Z-axis screen. These restrictions have brought a lot of inconvenience to our drawings.We live in a three-dimensional world-if we want to observe an object, we can:1, from a diffe

status to true. Now we have loaded image dataTextureimage [0]. We will use it to create three textures. The following line tells OpenGL that we want to create three textures, which will be stored inTexture [0],Texture [1]AndTexture [2]. Glgentextures (3, texture [0]); // create a texture In Lesson 6, we use linear filtered texture map

Tool: xcode 4.2 Development Environment: cocoa, OpenGL, objective-C 1. Create a project myopengl Open xcode, select create a new xcode project, select cocoa application in the pop-up window, and enter the project name myopengl after the next step. The xcode window is as follows: 2. Add OpenGL and glut Libraries Click myopengl in project navigator on the left of

3D display models should be drawn in the project, so OpenGL should be used, and the models should be used in MFC and ActiveX in MFC, and given the setting of their main program framework, conventional methods may not be implemented. Therefore, I have checked a lot of information and will summarize it here. First, summarize the most basic things. 1. According to the logic of the lecture, let's talk about th

Original post: cocos2D-X source code analysis learning OpenGL from cocos2D-X (3) ---- batch_command The last article introduced the quad_command rendering command, along with VAO and VBO. This article introduces the batch processing rendering command batchcommand. The batch processing command processing is relatively simple in render. 1 else if (commandtype = ren

OpenGL ES 2.0 VBO and rendering 1.VBO Initialization1) glgenbuffers () generates Bufferid 2) Glbindbuffer () operates it, the parameter is Vbo Bufferid 3) glbufferdata () specifies the data and usage inside When you want to use this VBO then Glbindbuffer () its bufferid, which generally put vertex data (including the model of XYZ and texture coordinates UV), in

Go from "translation" Nehe OpenGL tutorialObjectiveStatement, this Nehe OpenGL tutorial series of articles by 51 blog yarin Translation (2010-08-19), this blog for reprint and a little collation and modification. Thank you for compiling Nehe's OpenGL pipeline tutorial, as w

glint and glsizei ),F indicates a 32-bit floating point number (OpenGL defines this type as glfloat and glclampf ),D indicates a 64-bit floating point number (OpenGL defines this type as gldouble and glclampd ).V indicates that several parameters passed will use pointers. See the example below.These functions have the same function except for the type and number of parameters. For example, the functions of

in an application, understanding how to implement these classes in an Activity should be the first goal. GLSurfaceView This class is a View. In this class, you can draw and maintain objects called using OpenGL APIs, and it is similar to the SurfaceView class. Create an instance of the GLSurfaceView class and add a Renderer object to it to use this class. However, if you want to capture touch screen events, you should inherit the GLSurfaceView class a

at the same time. Now, click "Build and Go" to see what you get:Welcome to you, 3d objects. How does one map the texture?I think what we need now is not just a solid color object. Let's use the texture in the previous tutorial to map six faces to make the cube more exciting. Okay, let's keep the texture Loading Function in our project. We only need to modify our drawView function. Now, I will show you how to perform one-time rapid texture ing. First,